Ancient petroglyphs stolen from California site recovered

LOS ANGELES (Reuters) - Four ancient petroglyphs that were stolen from a historic site in Northern California last year have been recovered, but no suspects have been identified in the brazen theft, federal authorities said on Thursday.

The petroglyphs, which were carved into volcanic rock more than 3,500 years ago, were discovered missing in October from the site in the Volcanic Tablelands, east of Yosemite, near California's border with Nevada.

They are said to represent a pristine example of Great Basin rock art that portrayed the daily hunter-gatherer activities that took place in the area at the time....